Patrick Troughton

The Doctor

Anneke Wills

Polly

Michael Craze

Ben Jackson

Frazer Hines

Jamie McCrimmon

Patrick Barr

Hobson

André Maranne

Benoit

Michael Wolf

Nils

John Rolfe

Sam

Mark Heath

Ralph

Alan Rowe

Voice from Space Patrol/Dr. Evans

Denis McCarthy

Voice of Rinberg

Barry Ashton

Scientist

Derek Calder

Scientist

Arnold Chazen

Scientist

Leon Maybank

Scientist

Morris Barry